Chuck.



H. P. TOWNSEND.

CHUCK.

' APPLICATION FILED OCT. 14,1903.

921,568, Patented May 11, 1909.

" 2 SHEETS-SHEET 1 Afform'ys THE NORRIS PETERSCQ, WASHINGTON. 1:. c4

H. P. TOWNSEND.

ormox. APPLICATION FILED OUT. 14,1903.

Patented May 11', 1909.

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direction, the friction ring 23 being contracted to grasp the opening ring 20, the pin ions 18 are caused to rotate on their axes. The ring 20 being held against rotation, the action of the pinions rotates the scroll ring 1 1 at a faster rate than that at which the chuck body is moving and the grooves in the ring acting upon the scroll studs on the jaws cause the latter to be opened' If the lever handle 26 is moved in the opposite direction the scroll ring is held against rotation and the chuck body continuing to revolve closes the chuck jaws. as the chuck jaws come together and grasp a piece of work the extent of grip will be determined by the amount of force applied to the lever handle 26. The strain as the chuck jaws grasp the work will be successfully resisted by the shoulders on the chuck jaws resting against the scroll shoulders 14 on the ring.

It is obvious that the construction herein described may be modified or changed to a considerable extent'without departing from the invention and I do not desire or intend to limit myself to the exact construction herein shown and described.

It will be observed that I provide a self contained structure all the working parts of which are arranged within and wholly inclosed by the casing of the chuck body. It is absolutely essential in devices of this class that the several parts be thoroughly protected from chips and liability to injury. In the device above described I provide a self contained tool which may readily be applied to or removed from a spindle and used in the place of any ordinary chuck or like device, without necessitating any change of parts in the machine, and with the attendant advantages enumerated in connection with my device. In fact, I rovide a self-contained and bodily reniovab e chuck with all working parts and even the controlling devices coalesced into a single structure.

What I claim as my invention and desire to secure by Letters Patent is 1. A spindle, a complete chuck including a main body part located at the end of the spindle, chuck jaws located in the chuck body, a casing with operative connections for moving the jaws in one direction, and operatively connected with relatively movable means for moving the jaws in the op osite direction, and a friction brake arrange to be contracted and expanded to clutch said means when contracted and to clutch the casing when ex anded, whereby the chuck jaws are mover radially.

2. A chuck comprising a chuck body and means for securing it to a spindle, a relatively rotatable casing cooperating with said chuck and inclosing the parts, means appurtenant to the casing engaging the chuck jaws for moving them, and a friction brake In this closing movement mounted within the casing and adapted to engage said casing thereby actuating the chuck jaws.

3. A chuck comprising a chuck body and means for securing it to a spindle, chuck jaws mounted in the chuck body, a pair of concentrically arranged rings operatively interconnected for relative rotatable move,- ments, connections between one of said rings and the chuck jaws adapted to move said jaws radially upon relative rotation of the rings and a friction brake intermediate said rings having gripping and releasing actions with respect to either of said rings whereby the relative rotary movement of the rings may be controlled.

4. A chuck comprising a chuck body and means for securing it to a spindle, chuck jaws mounted in the chuck body, a pair of concentrically arranged rings, one of said rings operatively connected with the chuck jaws and adapted to move said jaws radiallyupon relative rotation of the rings, an in.- ternal gear operatively arranged within the outer ring, an external gear upon the inner ring, a pinion meshing with both of said gears and having a bearing upon the chuck body, and a friction brake intermediate said concentric rings having gripping and releasing actions with respect to either of said rings whereby said rings will be relatively rotated through the intermediate gearing.

5. A spindle, a chuck body located at the end of the spindle, chuck jaws mounted in the chuck body, a scroll ring provided with a gear to operate the chuck jaws, an opening ring provided with a gear arranged within the scroll ring, pinions meshing with the gears on the scroll and opening rings and shiftable means located within the scroll ring for preventing rotation of said rings under the control of the operator.

6. A spindle, a chuck body located at the end of the spindle, chuck jaws mounted on the chuck body, a ring mounted on the chuck body, connections between the ring and the jaws adapted to move the jaws radially by the rotation of the ring, an open ing ring mounted on the chuck body, and a friction ring located between said rings having gripping and releasing actions with respect to either of said rings, whereby the relative rotary movement of the rings may be controlled.

7. A spindle, a chuck body located on the spindle, chuck jaws mounted on the body, a scroll ring mounted in the chuck body, an opening ring mounted in the chuck body, pinions meshing with gears on the opening and scroll rings, a friction ring located be tween the opening and scroll rings, and means for operating the friction ring.

8. A s indle, a chuck located on the body and inc uding a body part, chuck jaws mounted on the body part, a scroll ring to operate the chuck jaws, an opening ring mounted on the chuck body, pinions meshing with gears on the openin and scroll rings, a friction ring mounted between the opening and scroll rings, means for holding the friction ring against rotation, and means for operating the friction ring.

9. In a chuck, in combination, a body part, a scroll ring located within the body part and cooperating therewith to form a chuck casing, jaws located in the body part, and connections intermediate the jaws and scroll ring for operating the former, an opening ring mounted on the body part and within the scroll ring, connections intermediate the scroll ring and opening ring for varying the relative rotation of said parts, and a friction device arranged intermediate the scroll ring and opening ring and adapted to retard the movement of either of said parts.

10. In a chuck, in combination, a body part, jaws mounted in said body part, a scroll ring 006 crating with said body part to form a chuc casing, an opening ring arranged within the scroll ring, gearing intermediate said scroll ring and opening ring, and frictional means for varying the action of said gearing whereby the relative rotation of the scroll ring and opening ring may be varied with the chuck in motion.

11. In combination in a chuck, a chuck body and means for securing said body to a spindle, chuck jaws carried in the chuck body and movable with respect thereto, a rotary ring connected with said chuck jaws, a relatively rotatable rin concentrically arranged with reference t ereto and operatively connected therewith, a friction brake arranged for expansive and contractile movements with reference to said rotary rings, and by said movements, controlling the relative movements thereof, whereby the chuck jaws are moved, and an operating handle and connections for opening and closing the friction brake ring.

HARRY P. TOWNSEND.

l/Vitnesses ARTHUR B. JENKINS, LEONA 0. SMITH. 

